Simultaneous presence of poly titanium chloride and Fe2O3-Mn2O3 nanocomposite in the enhanced coagulation for high rate As(V) removal from contaminated water

Production of D-amino-acid oxidase by Trigonopsis variabilis has been investigated using a two-stage cultivation technique. After transfer of exponentially growing cells to fresh medium, the enzyme was induced by addition of D-amino acids to the growth medium, among which D-methionine and D-alanine were the most effective. The simultaneous presence of the L form of amino acids or [Formula: see text] did not affect this induction. The presence of trace metals, inorganic phosphate, and a high rate of agitation were necessary for formation of maximal D-amino-acid oxidase activity. The enzyme is not subject to glucose repression.

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High rate aerobic treatment of synthetic wastewater using enhanced coagulation high-performance compact reactor (EC-HCR)

Biochemical Engineering Journal ◽

10.1016/j.bej.2006.08.006 ◽

2006 ◽

Vol 31 (3) ◽

pp. 223-227 ◽

Cited By ~ 2

Author(s):

Chen Zhiqiang ◽

Wen Qinxue ◽

Wang Jianlong

Keyword(s):

High Performance ◽

High Rate ◽

Synthetic Wastewater ◽

Aerobic Treatment ◽

Enhanced Coagulation

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Enhanced coagulation process by Fe-Mn bimetal nano-oxides in combination with inorganic polymer coagulants for improving As(V) removal from contaminated water

Journal of Cleaner Production ◽

10.1016/j.jclepro.2018.10.142 ◽

2019 ◽

Vol 208 ◽

pp. 384-392 ◽

Cited By ~ 16

Author(s):

Hadi Eslami ◽

Mohammad Hassan Ehrampoush ◽

Abbas Esmaeili ◽

Mohammad Hossein Salmani ◽

Ali Asghar Ebrahimi ◽

...

Keyword(s):

Inorganic Polymer ◽

Contaminated Water ◽

Enhanced Coagulation ◽

Coagulation Process

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Evidence of Reproductive Disturbance in Astyanax Lacustris (Teleostei: Characiformes) From the Doce River After the Collapse of the Fundão Dam in Mariana, Brazil

10.21203/rs.3.rs-171535/v1 ◽

2021 ◽

Author(s):

Julia Merçon ◽

Dandara Silva Cabral ◽

Bárbara Chisté Teixeira ◽

Tatiana Miura Pereira ◽

Alliny Bona ◽

...

Keyword(s):

Iron Ore ◽

River Channel ◽

High Rate ◽

Contaminated Water ◽

Multiple Spawning ◽

Histological Damage ◽

Iron Ore Tailings ◽

Long Run ◽

Immature Cells ◽

Doce River

Abstract On November 5th, 2015, the Fundão Dam collapsed dumping more than 50 million/m3 of iron ore tailings, enriched with metals, into the Doce River channel. The objective of this study was to evaluate the reproductive biology and histological damage in Astyanax lacustris exposed to the metals from the dam collapse. The study was carried out at Doce River, in Espírito Santo State, Brazil. Monthly samplings were carried out for a year. Astyanax lacustris had multiple spawning: females reproductive peak was in September, October, November, and December; and males between September, October, January, and February. There was a latency in the formation of gonads. For male gonads, it was necessary a 6 cm growth for it to increase from 30% to 50% and 4 cm for female gonads to increase from 40% to 50%. There is a positive correlation between gonad’s concentration of Al and Fe and the rate of histological damage in females. Male gonads had a high rate of immature cells invading the cell lumen (47.36%) and female gonads showed higher frequency of atresia (39.64%). Fish exposed to the contaminated water showed high gonad histological damage. The observed changes can directly influence the organism development and reproduction in the long run, thus affecting A. lacustris population present in the region.

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High-rate adsorption of acetaminophen from the contaminated water onto double-oxidized graphene oxide

Chemical Engineering Journal ◽

10.1016/j.cej.2015.11.025 ◽

2016 ◽

Vol 287 ◽

pp. 665-673 ◽

Cited By ~ 42

Author(s):

Gholamreza Moussavi ◽

Zeynab Hossaini ◽

Mojtaba Pourakbar

Keyword(s):

Graphene Oxide ◽

High Rate ◽

Contaminated Water

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Structure of Palladium Single-Crystal Films Prepared by Flash Evaporation onto (001) NaCl Substrates

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100069272 ◽

1970 ◽

Vol 28 ◽

pp. 456-457

Author(s):

L. E. Murr ◽

G. Wong

Keyword(s):

Single Crystal ◽

High Vacuum ◽

Ultra High Vacuum ◽

High Rate ◽

Flash Evaporation ◽

Optimum Load ◽

Single Crystal Films ◽

Crystal Films ◽

A Current

Palladium single-crystal films have been prepared by Matthews in ultra-high vacuum by evaporation onto (001) NaCl substrates cleaved in-situ, and maintained at ∼ 350° C. Murr has also produced large-grained and single-crystal Pd films by high-rate evaporation onto (001) NaCl air-cleaved substrates at 350°C. In the present work, very large (∼ 3cm2), continuous single-crystal films of Pd have been prepared by flash evaporation onto air-cleaved (001) NaCl substrates at temperatures at or below 250°C. Evaporation rates estimated to be ≧ 2000 Å/sec, were obtained by effectively short-circuiting 1 mil tungsten evaporation boats in a self-regulating system which maintained an optimum load current of approximately 90 amperes; corresponding to a current density through the boat of ∼ 4 × 104 amperes/cm2.

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Rapid Freezing of Freeze-Etch Specimens

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s1431927600003275 ◽

1980 ◽

Vol 38 ◽

pp. 752-755

Author(s):

A. Elgsaeter ◽

T. Espevik ◽

G. Kopstad

Keyword(s):

Low Temperature ◽

Metal Surface ◽

Relative Velocity ◽

Thermal Contact ◽

High Rate ◽

Rapid Freezing ◽

Temperature Decrease ◽

Freeze Etching

The importance of a high rate of temperature decrease (“rapid freezing”) when freezing specimens for freeze-etching has long been recognized1. The two basic methods for achieving rapid freezing are: 1) dropping the specimen onto a metal surface at low temperature, 2) bringing the specimen instantaneously into thermal contact with a liquid at low temperature and subsequently maintaining a high relative velocity between the liquid and the specimen. Over the last couple of years the first method has received strong renewed interest, particularily as the result of a series of important studies by Heuser and coworkers 2,3. In this paper we will compare these two freezing methods theoretically and experimentally.

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